Besides, the relation between WUE and irrigation water amount, effective precipitation and effective irrigation area was analyzed in detail. 分析WUE与灌溉水量、有效降水量(EP)和有效灌溉面积的关系;
Calculation Model of Effective Precipitation(EP) at Growth Stages for Winter Wheat 冬小麦生育期有效降水量(EP)计算模式研究
To build a common and effective precipitation forecast model. 旨在建立一个适用普遍且有效的降水预报模型。
Paddy has an high effective precipitation, but the lowest satisfaction in water requirement. 系统中水稻的有效降水量(EP)虽然很大,但水分满足率最低;薯类、豆类等作物的有效降水量(EP)小,但水分满足率较高。
According to the spatial distribution of effective precipitation frequency, the province can be divided into 4 main regions; 甘肃省年有效降水次数异常区域大致分为4个关键区;